I firmly believe that given the soapbox that Sheldon and the other members of the Rules Committee have an article extolling the virtues of playing with un-set cards and a sincere personal recommendation to try it would have been enough
5D's Wheelie Breakers promotional cards Yu-Gi-Oh
Mickey Mouse - Artful Rogue has the Emerald ink classification and boasts a big six points for attack and a generous five points for defense
While toughness is typically a measure of a creature's defensive ability, the printing of cards like Assault Formation, which allow creatures to assign damage equal to their toughness, has made these creatures sought after for toughness-themed decks
The only pure Sea Serpent archetype is Atlantean, which is often paired with Mermail
But its real purpose is its other ability: Whenever a creature an opponent controls is dealt excess noncombat damage, amass Orcs X, where X is that excess damage. It can be a great source of Amass Orcs and it is a part of a 2 card combo with Blasphemous Act that results in near-infinite +1/+1 counters on an Army token and near-infinite damage to all creatures